Improved elevator



UNITED STATES PATENT OEEIGE.

N. L. MILBURN, OF ST. LOUIS, MISSOURI.

IMPROVED ELEVATO R.

Specification forming part of Letters Patent No. 82,540, dated September 29, 1868.

To all whom it may concern:

Be it known that I, N. L. MILBURN, of St. Louis, in the county of St. Louis and State of Missouri, have invented a new and Improved Elevator; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

Figures 1 and 2 are corresponding eleva- 'tions of my invention, taken at right angles to each other. Fig. 3 is a plan view of the same, a portion of the upper part, comprising the drum, being removed to exhibit the platforms beneath.

Similar letters of reference indicate corresponding parts.

The object of this invention is to provide a simple and effective machine for elevating bricks and other building material to the workmen on the scaifold.

It consists of a pair of platforms attached to the ends of a chain or rope, which passes over a drum or broad pulley mounted on a shaft at the top of a suitable frame-work, toget-her with other accessory mechanism. On the same shaft with the drum is another pulley, which is driven by an endless chain. or rope, each part of which passes down to and under a sheave in a block located at the foot of the ame-work, andfrom thence extends out horizontally to another sheave located at a proper distance from the base of the frame. The horse or other draft-animal is attached to one of the horizontal parts of the endless chain, and walks tov and fro throughout the extent of the horizontal parts of the endless chain.

In the drawings, A is a tower of frame-work, suitably braced, as shown, and arising from a base-platform, B. a a a a are guide gutters affixed within the frame-work, and running the whole'length of the same, from top to bottom. These, in conjunction with` the central guideplank b, serve to guide the elevating -platforms d d as they move up and down, and to retain them from swinging about.

The shaft e bears a drum, f, and a groovedv pulley, g, over which latter the endless chain 7L t passes. The chain or rope j of the platforms passes around the drum f one or more times, to prevent it from rendering or slipping thereon when one of the plat-forms is loaded. The draftanimal is hitched to one of the horizontal parts t of the endless chain, which said parts pass under the sheaves in the block k, and from thence horizontally to a single sheave in the block l, affixed at a proper distance from the base of the frame, as shown.

As t-he draft-animal walks to and fro, the

platforms are alternately raised and lowered, so that as one ascends, loaded with bricks or` other building matter, the other descends empty. v

The platforms arc attached to the rope or chain j by means of four parts from the platform corners, meetiu g and attached to the single part, as shown. v

The platforms may be substituted by buckets, boxes, or other vessels, according to the nature of the matter to be elevated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The arran gement of the endless rope h t' with relation to the frame A, sheaves 7c l, pulley g, shaft e, drum f, and platforms d, whereby the forme-r is applied in two directions to elevate and lower the platforms, as herein sho wn and described.

2. The described construction of the frame A, having the corner guides a, and 'central guide b for the platforms, as herein shown and described, for the purpose specified.

The above specification of my invention signed by me this 22d day of July, 1868.

N. L. MILBURN.

lVitnesses GEO. B. FIELD, CRAs. BoBB. 

